17012121023 has 2 divisors, whose sum is σ = 17012121024. Its totient is φ = 17012121022.

The previous prime is 17012121019. The next prime is 17012121107. The reversal of 17012121023 is 32012121071.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 17012121023 - 2² = 17012121019 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 17012120986 and 17012121004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17012121223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8506060511 + 8506060512.

It is an arithmetic number, because the mean of its divisors is an integer number (8506060512).

Almost surely, 2^17012121023 is an apocalyptic number.

17012121023 is a deficient number, since it is larger than the sum of its proper divisors (1).

17012121023 is an equidigital number, since it uses as much as digits as its factorization.

17012121023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 20.

Adding to 17012121023 its reverse (32012121071), we get a palindrome (49024242094).

The spelling of 17012121023 in words is "seventeen billion, twelve million, one hundred twenty-one thousand, twenty-three".